Everything there is up for negotiation. Who has the stronger position, tends to get the most favourable terms.
The only situation where there can often be a presumption of copyright is if something is written by an employee of e.g. a teaching institution, on behalf or at the behest of that institution, but then that would be present in the contract of employment.
Simon Ambridge Series 40 (2005)
Trevor Semple Series 88 (1992)
Louis Panormo (1838)
Alexander Batov Baroque Guitar (2013)
Simon Ambridge 'Hauser' (2018)